Exodus 5:9 KJV
Let there more work be laid upon the men, that they may labour therein; and let them not regard vain words.
Exodus 5:9, King James Version
In context
8 And the tale of the bricks, which they did make heretofore, ye shall lay upon them; ye shall not diminish ought thereof: for they be idle; therefore they cry, saying, Let us go and sacrifice to our God.
9 Let there more work be laid upon the men, that they may labour therein; and let them not regard vain words.
10 And the taskmasters of the people went out, and their officers, and they spake to the people, saying, Thus saith Pharaoh, I will not give you straw.